243423442 has 8 divisors (see below), whose sum is σ = 386613756. Its totient is φ = 114552192.

The previous prime is 243423431. The next prime is 243423449. The reversal of 243423442 is 244324342.

It is a happy number.

243423442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 204747481 + 38675961 = 14309^2 + 6219^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 243423442.

It is not an unprimeable number, because it can be changed into a prime (243423449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3579723 + ... + 3579790.

Almost surely, 2^243423442 is an apocalyptic number.

243423442 is a deficient number, since it is larger than the sum of its proper divisors (143190314).

243423442 is a wasteful number, since it uses less digits than its factorization.

243423442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7159532.

The product of its digits is 18432, while the sum is 28.

The square root of 243423442 is about 15602.0332649306. The cubic root of 243423442 is about 624.3874035972.

Adding to 243423442 its reverse (244324342), we get a palindrome (487747784).

The spelling of 243423442 in words is "two hundred forty-three million, four hundred twenty-three thousand, four hundred forty-two".